The new ergonomically designed device has the same parameters as its predecessor; adjustable pulse rate and pulse width, and has three modes of operation; constant, width modulation, and burst. The new design of the device incorporates a sliding amplitude control cover for safety, and a permanently attached 9 volt battery cover to prevent loss. The 9 volt battery compartment has been redesigned for simple insertion and removal of the battery. To provide comfort while wearing, the belt clip has been positioned horizontally.